Dilution Calculator (C1V1 = C2V2)
Work out how much stock solution and solvent you need to reach a target concentration. The result updates as you type, with the working underneath so you can check it.
Your details
Result
V₂
300
- Solvent to add
- 275
- Keep concentration units the same on both sides and volume units the same on both sides.
Good to know: C₁V₁ = C₂V₂
Please note: For study and planning. Check calculations independently before using results with chemicals, electricity, pressure or machinery, and follow safety data sheets, manufacturer instructions and local regulations.
About this tool
Formula
C₁V₁ = C₂V₂
Questions people ask
How do I dilute a stock solution?
Use C₁V₁ = C₂V₂. To make 300 mL of 1 M from 12 M stock, take 25 mL of stock and add water up to 300 mL. Add acid to water, not water to acid.
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How we calculate this
We use the standard published formula or definition for this calculation, and we show the working so you can check it.
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